PHP next() Function

PHP natsort() Function

Last Updated : 20 Jun, 2023

The natsort() function is an inbuilt function in PHP which is used to sort an array by using a “natural order” algorithm. The natural order tells the order to be used as a normal human being would use. That is, it does not check the type of value for comparison. For example, in string representation 30 is less than 7 according to the standard sorting algorithm as 3 comes before 7 lexicographically. But in natural order 30 is greater than 7.

Syntax:

bool natsort(array)

Parameters: This function accepts a single parameter $array. It is the array which natsort() function is going to sort.

Return Value: It returns a boolean value i.e., TRUE on success and FALSE on failure.

Below programs illustrate the natsort() function in PHP:

Program 1:

<?php 
  
// input array 
$arr1 = array("12.jpeg", "10.jpeg", "2.jpeg", "1.jpeg"); 
$arr2 = $arr1; 
  
// sorting using sort function. 
sort($arr1); 
  
// printing sorted element. 
echo "Standard sorting\n"; 
print_r($arr1); 
  
// sorting using natsort() function. 
natsort($arr2); 
  
// printing sorted element. 
echo "\nNatural order sorting\n"; 
print_r($arr2); 
  
?> 

Output:

Standard sorting
Array
(
    [3] => 1.jpeg
    [1] => 10.jpeg
    [0] => 12.jpeg
    [2] => 2.jpeg
)

Natural order sorting
Array
(
    [3] => 1.jpeg
    [2] => 2.jpeg
    [1] => 10.jpeg
    [0] => 12.jpeg
)

Program 2:

<?php 
  
// input array 
$arr = array("gfg15.jpeg", "gfg10.jpeg", "gfg1.jpeg", 
                           "gfg22.jpeg", "gfg2.jpeg"); 
  
// sorting using natsort() function. 
natsort($arr); 
  
// printing sorted element. 
echo "\nNatural order sorting\n"; 
print_r($arr); 
  
?> 

Output:

Natural order sorting
Array
(
    [2] => gfg1.jpeg
    [4] => gfg2.jpeg
    [1] => gfg10.jpeg
    [0] => gfg15.jpeg
    [3] => gfg22.jpeg
)

Reference:
http://php.net/manual/en/function.natsort.php

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